首页
产品
黄页
商标
征信
会员服务
注册
登录
全部
|
企业名
|
法人/股东/高管
|
品牌/产品
|
地址
|
经营范围
发明名称
Improvements in switching arrangements for telephone systems
摘要
申请公布号
GB374952(A)
申请公布日期
1932.06.20
申请号
GB19310008514
申请日期
1931.03.19
申请人
TELEFONAKTIEBOLAGET L. M. ERICSSON
发明人
分类号
H04M17/02
主分类号
H04M17/02
代理机构
代理人
主权项
地址
您可能感兴趣的专利
Electrical connectors
Passive acoustic antenna
CULLET DELIVERY CONTAINER
Thermal printer
Solid state electrolytic capacitor
Coating composition
Production of ductwork systems
Apparatus for severing fins from fish
Burner control system
CHLORINATION PROCESS.
NUOVA FORMA POLIMORFA DI TERAZOSIN MONOCLORIDRATO E PROCESSO PER LA SUA PRODUZIONE.
PYRIDOINDOLOBENZODIAZEPINES AND DERIVATIVES AS ANTIPSYCHOTICS
MICROORGANISM OF RACE ESCHERICHIA COLI OR PSEUDOMONAS PUTIDA, METHOD OF ITS GROWING AND RECOMBINANT DNA
SYSTEM FOR LIMITING OF TURNING OVER OF SEALING RINGS AND CLAMPING OF THEIR JOINTS
PROCESS FOR PRODUCING BIODEGRADABLE THIN-WALLED STARCH-BASED MOLDINGS
ANTIMICROBIAL 5-HYDRAZINO-QUINOLINE DERIVATIVES
PAWL DEVICE OF HIGH-SPEED CIRCUIT BREAKER
REHABILITATION BED
MIXER
3-(2-ALKYLTHIO-6-BENZOTHIAZOLYLAMINO-METHYL)-2-BENZOTHIAZOLINE- -THIONES AND METHOD OF THEIR PREPARATION